Best 4 channel amp for 300.00

I need a 4 channel amp to power a set of 6.5 polk db components and a set of 6.5 polk db coax door speakers. Now I don't have to spend 300 I'm just saying thats my limit. What 4 chanel amps out there will power these speakers well. The amp will be run thru a JL cleansweep and summing device since I'm using a factory HU. Let me know. Thanks